. >> reporter: cell phone video captures boston police officer edward norton taking the plunge. he jumped into the frigid fort point channel in a downpour to rescue a woman. >> she was in that water calling for help and i can swim. >> he didn't hesitate, ran down the steps, took off his belt and jumped in the water and swam over to get her. >> reporter: officer norton says the woman was drowning and he didn't think twice about diving in pool. >> one of the other officers had been given the life preserver from someone else. i think it came from the tea party museum so, that helped a lot. i was able to hold onto her with -- hold onto that while she was holding on to the life preserver while holding myself up with the raft that was out there. >> the life preserver around her and he swam to this floating device right here and just held on until the fire department came and then the divers jumped in the water after them. >> reporter: bystanders watched as a boat picked both of them up. >> i'll tell you what, that cop was a hero today. he didn't even think twice about it. >> reporter: